Will Eating Cat Food Hurt a Dog? What Pet Parents Need to Know

September 24, 2025 |

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If you have dogs and cats, your dog might try to eat the cat’s food. But, there’s a reason why cats eat cat food and dogs eat dog food. Your dog probably won’t be harmed by sneaking some of the cat’s food now and then, but it isn’t something you should give them on a consistent basis.

Have you ever caught your pup with their snout in the cat’s food bowl? I sure have! My dog seems to think cat food is some kinda gourmet treat. But as a responsible pet parent, I’ve always wondered – is this harmless or potentially dangerous? Let’s dive into what happens when dogs eat cat food and whether you should be worried.

The Short Answer: It Depends

If your dog sneaks a small amount of cat food there’s usually no immediate cause for alarm. However regularly eating cat food or consuming large amounts can lead to health problems for your furry friend.

According to PetMD “While a small amount of cat food will not cause health problems for most dogs, it’s not recommended to feed dogs cat food.”

Why Dogs Love Cat Food So Much

Ever wonder why your dog is obsessed with the cat’s dinner? It’s not just because they’re being naughty!

  • Higher fat content – Cat food typically has more fat, making it super tasty to dogs
  • More protein – The rich protein content is extremely appealing to canine taste buds
  • Different aromas – Cat food often has stronger smells that dogs find irresistible

As EasyHealthyFoods notes, “Dogs are often attracted to cat food because of its high protein content and fat levels.” It’s essentially like offering your dog a fast food burger when they’re used to eating a balanced meal.

The Nutritional Differences Between Dog and Cat Food

To understand why cat food isn’t ideal for dogs, we need to understand the fundamental differences in their nutritional needs.

Nutrient Dog Food Cat Food
Protein 18% minimum 26% minimum
Fat 5.5% minimum 9% minimum
Taurine Not required 0.1% (dry) / 0.2% (wet)
Arachidonic Acid Not required 0.02%
Vitamin A 5,000 IU/kg 3,332 IU

Dogs are omnivores who evolved alongside humans, capable of digesting both plant and animal foods. Cats, however, are obligate carnivores who must eat meat to survive.

As PetMD explains, “Dogs are omnivores. They can get all the nutrients they need by eating ingredients derived from other animals or certain plants. Cats, on the other hand, are obligate carnivores.”

What Happens When Dogs Eat Cat Food?

Short-term Consumption

If your dog sneaks a little bit of cat food occasionally, you’ll likely see:

  • No obvious symptoms in most healthy dogs
  • Possible mild digestive upset (gas, soft stool)
  • Increased thirst due to higher protein content

Long-term or Large Amount Consumption

Regular cat food consumption or eating a large amount at once can cause:

  • Gastrointestinal upset – Vomiting, diarrhea, and abdominal discomfort
  • Pancreatitis risk – The high fat content can trigger inflammation of the pancreas
  • Weight gain – Cat food is calorie-dense compared to dog food
  • Nutrient imbalances – Over time, this can lead to health problems
  • Kidney strain – The excess protein can put pressure on your dog’s kidneys

Dogs Who Should NEVER Eat Cat Food

Some dogs are especially vulnerable to problems from cat food:

  • Dogs with a history of pancreatitis
  • Dogs with kidney or liver disease
  • Dogs on prescription low-fat diets
  • Dogs with sensitive stomachs
  • Overweight dogs

For these pups, even small amounts of cat food could trigger serious health issues.

What To Do If Your Dog Eats Cat Food

So your dog just devoured half a bowl of kitty kibble. Now what?

  1. Small amounts: If your dog seems fine and only ate a little bit, monitor them for any signs of digestive upset.

  2. Large amounts: Skip their next meal to give their digestive system time to process the rich food.

  3. Watch for symptoms: Look for vomiting, diarrhea, lethargy, or signs of abdominal pain.

  4. Contact your vet: If your dog is showing concerning symptoms or has a pre-existing condition, call your vet for advice.

As PetMD advises, “Call your veterinarian for advice if your dog is acting sick after eating cat food.”

Emergency Situations: Cat Food as a Last Resort

We’ve all been there – you’ve run out of dog food, the stores are closed, and you’re wondering if one meal of cat food will be okay.

In a true emergency, cat food is better than no food at all for most healthy dogs. However, it should be a one-time solution only, and you should switch back to proper dog food as soon as possible.

As EasyHealthyFoods suggests, “While it’s not recommended to feed your dog cat food regularly, it may be acceptable in an emergency situation where dog food is not available.”

Preventing Your Dog from Eating Cat Food

Since prevention is better than cure, here are some practical ways to keep your dog out of the cat’s bowl:

  • Feed in separate rooms – The simplest solution is physical separation
  • Elevated feeding stations – Most cats can jump to heights dogs can’t reach
  • Door props or cat doors – Allow cats access while keeping dogs out
  • Microchip feeders – These only open for your cat’s microchip
  • Scheduled feeding – Feed your cat at specific times and pick up leftover food
  • Pet gates with cat doors – Allow cats to slip through while keeping dogs out

The Bottom Line

Will eating cat food hurt your dog? In small amounts, probably not – but it’s definitely not something to encourage. The occasional stolen nibble isn’t usually cause for panic, but regularly eating cat food can lead to health problems for your canine companion.

Your best bet is to stick with species-appropriate nutrition and take steps to keep your dog away from the cat’s food bowl. After all, we want our furry friends to live their healthiest, happiest lives!

FAQs About Dogs Eating Cat Food

Can a dog die from eating cat food?

While technically possible in severe cases (like if a dog with pancreatitis eats a large amount), death from eating cat food is extremely rare. Most healthy dogs will experience digestive upset at worst.

Why does my dog only want to eat cat food?

Dogs are attracted to the higher fat and protein content in cat food. Try finding a dog food with similar protein sources to tempt them back to their own food.

How can I tell if my dog is sick from eating cat food?

Watch for vomiting, diarrhea, lethargy, excessive thirst, or signs of abdominal pain. If these symptoms occur, contact your veterinarian.

Can puppies eat cat food?

Puppies should definitely not eat cat food. They have specific nutritional requirements for proper growth and development that cat food won’t meet.

Is wet cat food worse for dogs than dry cat food?

Both can cause issues, but wet cat food typically has higher fat content, which may be more likely to cause digestive upset or pancreatitis in sensitive dogs.

Remember, when in doubt about your pet’s health, always consult with your veterinarian. They know your dog’s specific health needs and can provide personalized guidance!

will eating cat food hurt a dog

My Dog Ate Cat Food – What Do I Do?

Dogs get into cat food all of the time. Some steal from the cat’s bowl, others break into food bags and containers. Eating cat food on occasion may lead to nothing more than vomiting and diarrhea, but this can vary from dog to dog. If your dog exhibits signs of intestinal discomfort after eating cat food, call your veterinarian.

If your dog regularly gets into cat food, it’s best to change where you keep your cat’s food or where and how you feed your cat. As a general rule, try to discourage your dog from eating cat food unsupervised by placing it out of their reach. As always, pay attention to your dog’s reaction when feeding them something new and talk to your veterinarian about any concerns you may have.

will eating cat food hurt a dog

Complications of Feeding Cat Food to Dogs

If your dog eats a lot of cat food on a regular basis, or if you’re feeding your dog a diet of cat food instead of dog food, complications may arise, as it doesn’t have the correct balance of protein, fiber, and all of the nutrients dogs need to stay healthy.

Dogs can certainly survive on cat food in a tough spot, but the nutrient imbalance can lead to gastrointestinal upset, obesity, and pancreatitis. Pancreatitis requires immediate veterinary care. Symptoms include abdominal pain and a hunched back, lethargy and weakness, appetite loss, vomiting and diarrhea, a distended abdomen, and fever. Even if your dog eats cat food and suffers no obvious ill effects, the high protein levels can be hard on their liver and kidney.

Will cat food hurt a dog?